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 46 function addFields(fieldNames, disable) { 47 48 // If no field names exist do not attempt to collect their values. 49 50 if (fieldNames == "") { 51 return ""; 52 } 53 54 var requestBody = ""; 55 56 // Process each target field name. 57 58 var fieldNameArray = fieldNames.split(","); 59 60 // Add the values of the dependent fields. 61 62 for (var i = 0; i < fieldNameArray.length; i++) { 63 var fieldName = fieldNameArray[i]; 64 65 // Find the values of the target field. 66 67 var fieldValue; 68 var fieldNodes = document.getElementsByName(fieldName); 69 for (var v = 0; v < fieldNodes.length; v++) { 70 71 // Test for different field types. 72 73 if (fieldNodes[v].options) { 74 for (var opt = 0; opt < fieldNodes[v].options.length; opt++) { 75 if (fieldNodes[v].options[opt].selected) { 76 fieldValue = fieldNodes[v].options[opt].value; 77 requestBody += ("&" + fieldName + "=" + fieldValue); 78 } 79 } 80 } else { 81 fieldValue = fieldNodes[v].value; 82 requestBody += ("&" + fieldName + "=" + fieldValue); 83 } 84 } 85 86 // NOTE: Konqueror hack: disable fields. 87 88 if (disable) { 89 disableFields(fieldName); 90 } 91 } 92 93 return requestBody; 94 } 95 96 function disableFields(targetFieldName) { 97 98 for (var i = 0; i < document.forms.length; i++) { 99 var form = document.forms[i]; 100 for (var j = 0; j < form.elements.length; j++) { 101 if (form.elements[j].name == targetFieldName) { 102 form.elements[j].name = ""; 103 } 104 } 105 } 106 } 107 108 function showMismatch(targetFieldNameArray) { 109 110 // Show how the number of field elements with a given name can be different 111 // from the number known to the DOM Level 0 part of the API. 112 113 for (var h = 0; h < targetFieldNameArray.length; h++) { 114 var targetFieldName = targetFieldNameArray[h]; 115 var targetFieldNodes = document.getElementsByName(targetFieldName); 116 alert("Nodes for " + targetFieldName + ": " + targetFieldNodes.length); 117 118 var count = 0; 119 for (var i = 0; i < document.forms.length; i++) { 120 var form = document.forms[i]; 121 for (var j = 0; j < form.elements.length; j++) { 122 if (form.elements[j].name == targetFieldName) { 123 count++; 124 } 125 } 126 } 127 alert("Fields for " + targetFieldName + ": " + count); 128 } 129 }