function doCheckAll(obj,checkBoxName) 
{ 
    //var checkboxs = document.all.namedItem(checkBoxName);
	var checkboxs = document.getElementsByName(checkBoxName);
    for(var i=0;i<checkboxs.length;i++){
        checkboxs[i].checked = obj.checked;
    }
} 

function hasSelectCheckBox(form) {
    var hasData = false;
    for (var i=0;i<form.elements.length;i++) {
        if (form.elements[i].type == 'checkbox' && form.elements[i].checked) {
            hasData = true;
            break;
        }
    }
    return hasData;
}
function selectCheckBox(form, checked) {
    if (form == null || form.elements == null) {
        alert("No data!!");
        return;
    }
    
    for (var i=0;i<form.elements.length;i++) {
        if (form.elements[i].type == 'checkbox') {
            form.elements[i].checked = checked;
        }
    }
}
function trim(s) {
    return s.replace( /^\s*/, "" ).replace( /\s*$/, "" );
}
/**
 * To hide element
 * @param element The element name or object.
 */
function hideElement(element) {
    var elt;
    if (typeof element == "string") {
        elt = document.getElementById(element);
    } else if (element != null) {
        elt = element;
    }
    elt.style.visibility='hidden';
}
/**
 * To show element
 * @param element The element name or object.
 */
function showElement(element) {
    var elt;
    if (typeof element == "string") {
        elt = document.getElementById(element);
    } else if (element != null) {
        elt = element;
    }
    elt.style.visibility='hidden';
}
function hideBlock(element) {
    var elt;
    if (typeof element == "string") {
        elt = document.getElementById(element);
    } else if (element != null) {
        elt = element;
    }
    elt.style.display="none";
}
/**
 * 
 */
function showBlock(element) {
    var elt;
    if (typeof element == "string") {
        elt = document.getElementById(element);
    } else if (element != null) {
        elt = element;
    }
    elt.style.display="block";
}

function switchBlock(element) {
    var elt;
    if (typeof element == "string") {
        elt = document.getElementById(element);
    } else if (element != null) {
        elt = element;
    }
    if (elt.style.display=="block") {
        elt.style.display="none";
    } else {
        elt.style.display="block";
    }
    
}
/**
 * @param element -  element name or element object
 * @param styleAttr - an association array specifies style attribute/value. 
                      ex {'background': '#FFFFFF','color':'#000000'}
 */
function changeStyle(element, styleAttr) {
    if (typeof element == 'string') {
        element = document.getElementById(element);
    }
    for(attr in styleAttr) {
        if (typeof element.style[attr] != 'undefined') {
            element.style[attr] = styleAttr[attr];
        }
    }
}
/**
 * @param elementName: A element name or An array of element name;
 * @return a element or an array contains elements. if element name is undefined, element will be null.
 */
function getElement(elementName) {
    if (typeof elementName == "string") {
        return document.getElementById(elementName);
    } else if (typeof elementName != "undefined"){
        var element = new Array();
        for (var i=0;i<elementName.length;i++) {
            if (typeof elementName[i] == "string") {
                element.push(document.getElementById(elementName[i]));
            } else {
                element.push(null);
            }
        }
        return element;
    } else {
        return null;
    }
}

function getContextPath() {
  var contextPath = "/" + location.pathname.split("/")[1];
  return contextPath;
}

// 數值的全形轉半形
function unAsc(text) {
  var asciiTable = "。０１２３４５６７８９";
  var big5Table = ".0123456789";

  var result = "";
  for ( var i = 0 ; i < text.length ; i ++ ) {
    var val = text.charAt(i) ; 
    var j = asciiTable.indexOf(val);
    result += ( j > -1 ? big5Table.substring( j , j +1 ) : val );
  }
  return result;
}

/**
 * 清除表單欄位資料 
 * 1. 下拉選單(預設第一選項)
 * 2. 文字輸入框(清空)
 * 3. CheckBox(取消所有勾選)
 * @author Joyce Lai 2011/07/30
 */
function resetFormData(formObj) {    
    for(var i = 0; i < formObj.elements.length; i++) {
        //下拉選單- 選擇第一個選項
        if(formObj.elements[i].type == "select-one"){
            formObj.elements[i].selectedIndex = 0;
        }    
        //文字輸入框- 清除資料
        else if (formObj.elements[i].type == "text" || formObj.elements[i].type == "textarea") {
            formObj.elements[i].value = "";
        }        
        //CheckBox - 取消所有勾選
        else if (formObj.elements[i].type == "checkbox") {
            formObj.elements[i].checked = false; 
        }        
    }    
};

/**
 * 禁止上一頁
 * 建議使用方式
 * $(function(){
 * 	document.onkeydown = abgne;
 * })
 * 1. INPUT
 * 2. readonly的欄位
 * 3. disable的欄位
 * @author 2919 2012/12/21
 */
function abgne(){
	var elem = event.srcElement;  
    var name = elem.nodeName;
    
	if(window.event.keyCode==8){
		if(name=='INPUT' && (elem.readOnly==true || elem.disabled ==true)){
			return false;
		}
	}
};