function textCounter(field, countfield, maxlimit) {  
if (document.getElementById(field).value.length > maxlimit)  
document.getElementById(field).value = document.getElementById(field).value.substring(0, maxlimit);  
else  
document.getElementById(countfield).innerHTML ="请不要输入电话/邮箱/网址等任何联系方式,否则不能通过审核,还剩余<font color=red>" + (maxlimit - document.getElementById(field).value.length)+"</font>字";
}