1 | /* ----------------------------------------------------------------------------- |
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2 | file: ajax.js |
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3 | file version: 1.1.0 |
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4 | date: 2008-05-25 |
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5 | ------------------------------------------------------------------------------ |
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6 | author: grum at grum.dnsalias.com |
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7 | << May the Little SpaceFrog be with you >> |
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8 | ------------------------------------------------------------------------------ |
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9 | |
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10 | this classes provides base functions to add ajax into html page |
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11 | |
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12 | + create_httpobject provide a simple function to create an HTML request to a |
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13 | server ; return an XMLHttpRequest object (or compatible object for IE) |
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14 | |
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15 | + tHttpObject is a class providing : |
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16 | - an XMLHttpRequest object |
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17 | - |
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18 | |
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19 | ------------------------------------------------------------------------------ |
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20 | HISTORY VERSION |
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21 | v1.0.1 + [create_httpobject] overrideMimeType unknown by IE 7.0 ; |
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22 | v1.1.0 + add create_httpobject2 with mimetype parameter |
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23 | |
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24 | -------------------------------------------------------------------------- */ |
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25 | |
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26 | |
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27 | function create_httpobject(requesttype, charset, ajaxurl, async) |
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28 | { |
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29 | return(create_httpobject2(requesttype, charset, ajaxurl, async, '')); |
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30 | } |
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31 | |
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32 | function create_httpobject2(requesttype, charset, ajaxurl, async, mimetype) |
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33 | { |
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34 | if (window.XMLHttpRequest) |
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35 | { |
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36 | // IE7 & FF method |
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37 | http_request = new XMLHttpRequest(); |
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38 | } |
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39 | else |
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40 | { |
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41 | //Other IE method..... |
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42 | if (window.ActiveXObject) |
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43 | { |
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44 | try |
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45 | { |
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46 | http_request = new ActiveXObject("Msxml2.XMLHTTP"); |
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47 | } |
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48 | catch (e) |
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49 | { |
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50 | try |
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51 | { |
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52 | http_request = new ActiveXObject("Microsoft.XMLHTTP"); |
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53 | } |
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54 | catch (e) |
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55 | { |
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56 | window.alert("Your browser is unable to use XMLHTTPRequest"); |
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57 | } // try-catch |
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58 | } // try-catch |
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59 | } |
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60 | } // if-else |
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61 | |
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62 | if(charset=='') { charset='utf-8'; } |
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63 | |
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64 | http_request.onreadystatechange = function() { }; |
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65 | http_request.open(requesttype.toUpperCase(), ajaxurl, async); |
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66 | |
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67 | if(mimetype=='') |
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68 | { |
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69 | mimetype='text/html'; |
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70 | } |
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71 | |
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72 | try |
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73 | { |
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74 | http_request.overrideMimeType(mimetype+'; charset='+charset); |
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75 | } |
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76 | catch(e) |
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77 | { |
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78 | } |
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79 | |
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80 | if(requesttype.toUpperCase()=='POST') |
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81 | { |
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82 | http_request.setRequestHeader("Content-Type", "application/x-www-form-urlencoded"); |
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83 | } |
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84 | |
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85 | //method to restitute an XML object ; needed for compatibility between FF&IE |
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86 | http_request.XML = httpobject_responseXML; |
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87 | |
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88 | return(http_request); |
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89 | } |
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90 | |
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91 | |
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92 | function httpobject_responseXML() |
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93 | { |
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94 | if (document.implementation && document.implementation.createDocument) |
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95 | { |
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96 | //ff method |
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97 | return(this.responseXML); |
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98 | } |
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99 | else |
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100 | { |
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101 | //ie method |
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102 | return(xmlCreateFromString(this.responseText)); |
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103 | } |
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104 | } |
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