1 function requestUpdate(url, fieldNames, targetName, targetFieldNames, elementPath) { 2 3 // Note that XMLHttpRequest access may be denied if Mozilla believes that 4 // this resource's URL and the supplied URL are different. 5 6 var xmlhttp = new XMLHttpRequest(); 7 xmlhttp.open("POST", url, false); 8 9 // Add the element path specification. 10 11 var requestBody = ("element-path=" + elementPath); 12 13 // Send the controlling field value. 14 15 requestBody += addFields(fieldNames, false); 16 requestBody += addFields(targetFieldNames, true); 17 18 // Load the remote document with the given parameters sent as text in the request body. 19 20 xmlhttp.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded'); 21 xmlhttp.send(requestBody); 22 23 // Parse the result document. 24 25 var newDocument = Sarissa.getDomDocument(); 26 newDocument = (new DOMParser()).parseFromString(xmlhttp.responseText, "text/xml"); 27 28 // Find the definition of the affected field in the result document. 29 30 var newElement = newDocument.getElementById(targetName); 31 var targetElement = document.getElementById(targetName); 32 33 // Insert the new definition into the current document. 34 35 if (newElement != null && targetElement != null) { 36 var importedElement = document.importNode(newElement, true); 37 targetElement.parentNode.replaceChild(importedElement, targetElement); 38 //importedElement.setAttribute("style", "background-color:red;"); 39 } 40 41 // NOTE: Test Konqueror bug. 42 43 //showMismatch(targetFieldNameArray); 44 45 return false; 46 } 47 48 function addFields(fieldNames, disable) { 49 50 // If no field names exist do not attempt to collect their values. 51 52 if (fieldNames == "") { 53 return ""; 54 } 55 56 var requestBody = ""; 57 58 // Process each target field name. 59 60 var fieldNameArray = fieldNames.split(","); 61 62 // Add the values of the dependent fields. 63 64 for (var i = 0; i < fieldNameArray.length; i++) { 65 var fieldName = fieldNameArray[i]; 66 67 // Find the values of the target field. 68 69 var fieldValue; 70 var fieldNodes = document.getElementsByName(fieldName); 71 for (var v = 0; v < fieldNodes.length; v++) { 72 73 // Test for different field types. 74 75 if (fieldNodes[v].options) { 76 for (var opt = 0; opt < fieldNodes[v].options.length; opt++) { 77 if (fieldNodes[v].options[opt].selected) { 78 fieldValue = fieldNodes[v].options[opt].value; 79 requestBody += ("&" + encodeURIComponent(fieldName) + "=" + encodeURIComponent(fieldValue)); 80 } 81 } 82 } else { 83 fieldValue = fieldNodes[v].value; 84 requestBody += ("&" + encodeURIComponent(fieldName) + "=" + encodeURIComponent(fieldValue)); 85 } 86 } 87 88 // NOTE: Konqueror hack: disable fields. 89 90 if (disable) { 91 disableFields(fieldName); 92 } 93 } 94 95 return requestBody; 96 } 97 98 function disableFields(targetFieldName) { 99 100 for (var i = 0; i < document.forms.length; i++) { 101 var form = document.forms[i]; 102 for (var j = 0; j < form.elements.length; j++) { 103 if (form.elements[j].name == targetFieldName) { 104 form.elements[j].name = ""; 105 } 106 } 107 } 108 } 109 110 function showMismatch(targetFieldNameArray) { 111 112 // Show how the number of field elements with a given name can be different 113 // from the number known to the DOM Level 0 part of the API. 114 115 for (var h = 0; h < targetFieldNameArray.length; h++) { 116 var targetFieldName = targetFieldNameArray[h]; 117 var targetFieldNodes = document.getElementsByName(targetFieldName); 118 alert("Nodes for " + targetFieldName + ": " + targetFieldNodes.length); 119 120 var count = 0; 121 for (var i = 0; i < document.forms.length; i++) { 122 var form = document.forms[i]; 123 for (var j = 0; j < form.elements.length; j++) { 124 if (form.elements[j].name == targetFieldName) { 125 count++; 126 } 127 } 128 } 129 alert("Fields for " + targetFieldName + ": " + count); 130 } 131 } 132 133 // vim: tabstop=4 expandtab shiftwidth=4