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/*------------------------------------------------------
 *×÷Õߣºxieyu @ 2007-08-14
 *ÓïÑÔ£ºJavaScript
 *˵Ã÷£ºselectÔªËØjavascript³£ÓòÙ×÷
 * 1.ÅжÏÊÇ·ñ´æÔÚÖ¸¶¨valueµÄItem
 * 2.¼ÓÈëÒ»¸öItem
 * 3.ɾ³ýֵΪvalueµÄËùÓÐItem
 * 4.ɾ³ýijһ¸öindexµÄÑ¡Ïî
 * 5.¸üеÚindexÏîµÄvalueºÍtext
 * 6.ÉèÖÃselectÖÐÖ¸¶¨textµÄµÚÒ»¸öItemΪѡÖÐ
 * 7.ÉèÖÃselectÖÐÖ¸¶¨valueµÄµÚÒ»¸öItemΪѡÖÐ
 * 8.µÃµ½µ±Ç°Ñ¡ÖÐÏîµÄvalue
 * 9.µÃµ½µ±Ç°Ñ¡ÖÐÏîµÄindex
 *  10.µÃµ½µ±Ç°Ñ¡ÖÐÏîµÄtext
 * 11.Çå¿ÕËùÓÐÑ¡Ïî
-------------------------------------------------------*/
//1.ÅжÏÊÇ·ñ´æÔÚÖ¸¶¨valueµÄItem
function ExistValue(obj,value){
    for(var i=0;i<obj.options.length;i++){
        if(obj.options[i].value == value){
            return true;
        }
    }     
    return false;
}
//2.¼ÓÈëÒ»¸öItem
function AddItem(obj,text,value){
 var varItem = new Option(text,value);
 obj.options.add(varItem);
}
function AddItem1(obj,text,value){
 var option = document.createElement("OPTION"); 
 var varItem = new Option(text,value);
 obj.options.add(option);
 option.innerText = text;
 option.value=value;
 option.selected=true;
}
//3.ɾ³ýֵΪvalueµÄËùÓÐItem
function RemoveItems(obj,value){
 for(var i=0;i<obj.options.length;i++){
  if(obj.options[i].value == ItemValue){
   obj.options.remove(i);
  }
 }       
}
//4.ɾ³ýijһ¸öindexµÄÑ¡Ïî
function RemoveItem(obj,index){
 obj.options.remove(index);
}
//5.¸üеÚindexÏîµÄvalueºÍtext
function UpdateItem(obj,ind


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