function chkcard(){
 //15位和18位身份证号码的正则表达式
 var idcard=document.getelementbyid("card").value;
 var regidcard=/^(^[1-9]\d{7}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])\d{3}$)|(^[1-9]\d{5}[1-9]\d{3}((0\d)|(1[0-2]))(([0|1|2]\d)|3[0-1])((\d{4})|\d{3}[xx])$)$/;
 //如果通过该验证，说明身份证格式正确，但准确性还需计算
 if(regidcard.test(idcard)){
  if(idcard.length==18){
   var idcardwi=new array( 7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2 ); //将前17位加权因子保存在数组里
   var idcardy=new array( 1, 0, 10, 9, 8, 7, 6, 5, 4, 3, 2 ); //这是除以11后，可能产生的11位余数、验证码，也保存成数组
   var idcardwisum=0; //用来保存前17位各自乖以加权因子后的总和
   for(var i=0;i<17;i++){
    idcardwisum+=idcard.substring(i,i+1)*idcardwi[i];
   }
   var idcardmod=idcardwisum%11;//计算出校验码所在数组的位置
   var idcardlast=idcard.substring(17);//得到最后一位身份证号码
   //如果等于2，则说明校验码是10，身份证号码最后一位应该是x
   if(idcardmod==2){
    if(idcardlast=="x"||idcardlast=="x"){
    // alert("恭喜通过验证啦！");
	text_msg.style.display = "none";
    return true;
    }else{
	 text_msg.innerhtml = "身份证号码错误！";
     text_msg.style.display = "block";
     return false;
    }
   }else{
    //用计算出的验证码与最后一位身份证号码匹配，如果一致，说明通过，否则是无效的身份证号码
    if(idcardlast==idcardy[idcardmod]){
    text_msg.style.display = "none";
    return true;
    }else{
     text_msg.innerhtml = "身份证号码错误！";
     text_msg.style.display = "inline";
     return false;
    }
   }
  } 
 }else{
	 if(idcard==''){
	 text_msg.innerhtml = "身份证号码不能为空！";
     text_msg.style.display = "inline";
     return false;
	 }
	 text_msg.innerhtml = "身份证号码格式不正确！";
     text_msg.style.display = "inline";
     return false;
 }
}
/*
 * 只能是中文汉字
 */
 function chkxm(){
	var xmvalue=document.getelementbyid("xm").value;
	var aa=/^[\u4e00-\u9fa5]+$/;
	if(xmvalue==''){
	 text_xm.innerhtml = "姓名不能为空！";
     text_xm.style.display = "inline";
     return false;
	}else{
	if(aa.test(xmvalue)){
	text_xm.style.display = "none";
    return true;
	}
	 text_xm.innerhtml = "姓名只能为汉字！";
     text_xm.style.display = "inline";
     return false;
	} 
}
 function chkdh(){
	var xmvalue=document.getelementbyid("dh").value;
	var aa=/(\d{11})|^((\d{7,8})|(\d{4}|\d{3})-(\d{7,8})|(\d{4}|\d{3})-(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1})|(\d{7,8})-(\d{4}|\d{3}|\d{2}|\d{1}))$/;
	if(xmvalue==''){
	 text_dh.innerhtml = "联系电话不能为空！";
     text_dh.style.display = "inline";
     return false;
	}else{
	if(aa.test(xmvalue)){
	text_dh.style.display = "none";
    return true;
	}
	 text_dh.innerhtml = "联系电话有误！";
     text_dh.style.display = "inline";
     return false;
	} 
}
 function chkmz(){
	var xmvalue=document.getelementbyid("mz").value;
	if(xmvalue==''){
	 text_mz.innerhtml = "民族不能为空！";
     text_mz.style.display = "inline";
     return false;
	}else{
	text_mz.style.display = "none";
    return true;
	} 
}
 function chkqq(){
	var xmvalue=document.getelementbyid("qq").value;
	if(xmvalue==''){
	 text_qq.innerhtml = "qq或e－mail不能为空！";
     text_qq.style.display = "inline";
     return false;
	}else{
	text_qq.style.display = "none";
    return true;
	} 
}
function chkfrm(f){
		if(chkxm(f.xm)==false || chkcard(f.card)==false || chkdh(f.dh)==false || chkmz(f.mz)==false || chkqq(f.qq)==false){
		return false;
		}else{
		return true;
		}
	}