使用js获取表单元素的值

function getParams(formName) {
	var frmMain = document.getElementById(formName)?document.getElementById(formName):document.getElementsByName(formName)[0];
	var keys="";
	var values="";
	var params="";
	var textarea=new Array();
	var textareaValue=new Array();
	var hidden=new Array();
	var hiddenValue=new Array();
	var select=new Array();
	var selectValue=new Array();
	var text=new Array();
	var textValue=new Array();
	var checkboxValue=new Array();
	var checkboxAll=new Array();
	var checkbox=new Array();
	var radio=new Array();
	var radioAll=new Array();
	var radioValue=new Array();

	/**
	 * checkbox
	 */
	for(var c0=0;c0<frmMain.length;c0++){
		if(frmMain.elements[c0].type=='checkbox'){
			if(frmMain.elements[c0].name!="" && frmMain.elements[c0].name!=undefined){
				checkboxAll.push(frmMain.elements[c0].name);
			}
		}
	}
	checkboxAll.sort();
	for(var c1=0;c1<checkboxAll.length;c1++){
		if(checkboxAll[c1]==checkboxAll[c1+1]){
			continue;
		}
		checkbox[checkbox.length]=checkboxAll[c1];
	}
	for(var c2=0;c2<checkbox.length;c2++){
		var checkboxArr=document.getElementsByName(checkbox[c2]);
		checkboxValue[c2]="";
		for(var c3=0;c3<checkboxArr.length;c3++){
			if(checkboxArr[c3].checked){
				checkboxValue[c2]+=checkboxArr[c3].value+"<#ARR>";
			}
		}
	}

	/**
	 * radio
	 */
	for(var r0=0;r0<frmMain.length;r0++){
		if(frmMain.elements[r0].type=='radio'){
			if(frmMain.elements[r0].name!="" && frmMain.elements[r0].name!=undefined){
				radioAll.push(frmMain.elements[r0].name);
			}
		}
	}
	radioAll.sort();
	for(var r1=0;r1<radioAll.length;r1++){
		if(radioAll[r1]==radioAll[r1+1]){
			continue;
		}
		radio[radio.length]=radioAll[r1];
	}
	for(var r2=0;r2<radio.length;r2++){
		var radioArr=document.getElementsByName(radio[r2]);
		radioValue[r2]="";
		for(var r3=0;r3<radioArr.length;r3++){
			if(radioArr[r3].checked){
				radioValue[r2]=radioArr[r3].value;
			}
		}
	}

	/**
	 * text
	 */
	for(var t0=0;t0<frmMain.length;t0++){
		if(frmMain.elements[t0].type=='text'){
			if(frmMain.elements[t0].name!="" && frmMain.elements[t0].name!=undefined){
				text.push(frmMain.elements[t0].name);
				textValue.push(frmMain.elements[t0].value);
			}
		}
	}

	/**
	 * textarea
	 */
	for(var t1=0;t1<frmMain.length;t1++){
		if(frmMain.elements[t1].type=='textarea'){
			if(frmMain.elements[t1].name!="" && frmMain.elements[t1].name!=undefined){
				textarea.push(frmMain.elements[t1].name);
				textareaValue.push(frmMain.elements[t1].value);
			}
		}
	}

	/**
	 * select_one
	 */
	for(var s0=0;s0<frmMain.length;s0++){
		if(frmMain.elements[s0].type=='select-one'){
			if(frmMain.elements[s0].name!="" && frmMain.elements[s0].name!=undefined){
				select.push(frmMain.elements[s0].name);
				selectValue.push(frmMain.elements[s0].value);
			}
		}
	}

	/**
	 * hidden
	 */
	for(var h0=0;h0<frmMain.length;h0++){
		if(frmMain.elements[h0].type=='hidden'){
			if(frmMain.elements[h0].name!="" && frmMain.elements[h0].name!=undefined){
				if(frmMain.elements[h0].name!='parameters'){
					hidden.push(frmMain.elements[h0].name);
					hiddenValue.push(frmMain.elements[h0].value);
				}
			}
		}
	}

	for(var v1=0;v1<textValue.length;v1++){
		values+=textValue[v1]+"<#>";
	}
	for(var v6=0;v6<textareaValue.length;v6++){
		values+=textareaValue[v6]+"<#>";
	}
	for(var v2=0;v2<radioValue.length;v2++){
		values+=radioValue[v2]+"<#>";
	}
	for(var v3=0;v3<checkboxValue.length;v3++){
		values+=checkboxValue[v3]+"<#>";
	}
	for(var v4=0;v4<selectValue.length;v4++){
		values+=selectValue[v4]+"<#>";
	}
	for(var v5=0;v5<hiddenValue.length;v5++){
		if(v5==hiddenValue.length-1){
			if(hiddenValue[v5]==""){
				hiddenValue[v5]="<#NULL>";
			}
		}
		values+=hiddenValue[v5]+"<#>";
	}
	values=values.substring(0,values.length-3);
	values=values.split(" ").join("<#SPA>");  

	for(var k1=0;k1<text.length;k1++){
		keys+=text[k1]+",";
	}
	for(var k6=0;k6<textarea.length;k6++){
		keys+=textarea[k6]+",";
	}
	for(var k2=0;k2<radio.length;k2++){
		keys+=radio[k2]+",";
	}
	for(var k3=0;k3<checkbox.length;k3++){
		keys+=checkbox[k3]+",";
	}
	for(var k4=0;k4<select.length;k4++){
		keys+=select[k4]+",";
	}
	for(var k5=0;k5<hidden.length;k5++){
		keys+=hidden[k5]+",";
	}
	keys=keys.substring(0,keys.length-1);
	params=keys+"|"+values;
	frmMain.parameters.value=params;
}