function ch_sign(Eid){
            Eid=document.getElementById(Eid);
            if (Eid.value=='+'){
                Eid.value='-';
              }else{
                Eid.value='+';
            
              }
            }
            function tbShow(showname){
            var arr;
            arr=document.getElementsByName(showname);
                for(j=0;j<arr.length;j++){
                    if (arr[j].style.display=='none'){
                    arr[j].style.display='';
                    //arr[j].style.color='#999999';
                    }else{
                    arr[j].style.display='none';
                    }
                }
            }
			function over_font(Eid){
			Eid=document.getElementById(Eid);
			Eid.style.color='#FF3300';
			}
			function out_font(Eid){
			Eid=document.getElementById(Eid);
			Eid.style.color='#000000';
			}