JS获取form表单的所有输入值

function getFormQueryString(frmID) { 
		var frmID=document.getElementById(frmID); 
		var i,queryString = "", and = "";
		var item; // for each form\'s object
		var itemValue;// store each form object\'s value
		
		for( i=0;i<frmID.length;i++ ){
			item = frmID[i];// get form\'s each object
			if( item.name!=\'\' ){
				if( item.type == \'select-one\' ){
					itemValue = item.options[item.selectedIndex].value;
				}else if( item.type==\'checkbox\' || item.type==\'radio\') {
					if ( item.checked == false ){
						continue; 
					}
					itemValue = item.value;
				}else if( item.type == \'button\' || item.type == \'submit\' || item.type == \'reset\' || item.type == \'image\'){// ignore this type
					continue;
				}else{
					itemValue = item.value;
				}
				itemValue = encodeURIComponent(itemValue);
				queryString += and + item.name + \'=\' + itemValue;
				and="&";
			}
		}
		return queryString;
	}