function CheckIdNumber(objName) {
	var obj = document.getElementById(objName);
	var LegalID = "0123456789"
	var fResult=true;
	var value = 0;
	var sId=obj.value;
	if(sId.length<10)
		fResult=false;
	else{
      if((sId.charAt(0)=='A') || (sId.charAt(0)=='a')) value=10
      else if((sId.charAt(0)=='B') || (sId.charAt(0)=='b')) value=11
      else if((sId.charAt(0)=='C') || (sId.charAt(0)=='c')) value=12
      else if((sId.charAt(0)=='D') || (sId.charAt(0)=='d')) value=13
      else if((sId.charAt(0)=='E') || (sId.charAt(0)=='e')) value=14
      else if((sId.charAt(0)=='F') || (sId.charAt(0)=='f')) value=15
      else if((sId.charAt(0)=='G') || (sId.charAt(0)=='g')) value=16
      else if((sId.charAt(0)=='H') || (sId.charAt(0)=='h')) value=17
      else if((sId.charAt(0)=='J') || (sId.charAt(0)=='j')) value=18
      else if((sId.charAt(0)=='K') || (sId.charAt(0)=='k')) value=19
      else if((sId.charAt(0)=='L') || (sId.charAt(0)=='l')) value=20
      else if((sId.charAt(0)=='M') || (sId.charAt(0)=='m')) value=21
      else if((sId.charAt(0)=='N') || (sId.charAt(0)=='n')) value=22
      else if((sId.charAt(0)=='P') || (sId.charAt(0)=='p')) value=23
      else if((sId.charAt(0)=='Q') || (sId.charAt(0)=='q')) value=24
      else if((sId.charAt(0)=='R') || (sId.charAt(0)=='r')) value=25
      else if((sId.charAt(0)=='S') || (sId.charAt(0)=='s')) value=26
      else if((sId.charAt(0)=='T') || (sId.charAt(0)=='t')) value=27
      else if((sId.charAt(0)=='U') || (sId.charAt(0)=='u')) value=28
      else if((sId.charAt(0)=='V') || (sId.charAt(0)=='v')) value=29
      else if((sId.charAt(0)=='X') || (sId.charAt(0)=='x')) value=30
      else if((sId.charAt(0)=='Y') || (sId.charAt(0)=='y')) value=31
      else if((sId.charAt(0)=='W') || (sId.charAt(0)=='w')) value=32
      else if((sId.charAt(0)=='Z') || (sId.charAt(0)=='z')) value=33
      else if((sId.charAt(0)=='I') || (sId.charAt(0)=='i')) value=34
      else if((sId.charAt(0)=='O') || (sId.charAt(0)=='o')) value=35
      else fResult = false ;
      //alert('Value='+value) ;
    }
    if(fResult==true){
	    value = Math.floor(value/10) + (value%10)*9 +
	    parseInt(sId.charAt(1))*8+
	    parseInt(sId.charAt(2))*7+
	    parseInt(sId.charAt(3))*6+
	    parseInt(sId.charAt(4))*5+
	    parseInt(sId.charAt(5))*4+
	    parseInt(sId.charAt(6))*3+
	    parseInt(sId.charAt(7))*2+
	    parseInt(sId.charAt(8))+
	    parseInt(sId.charAt(9)) ;
	    value = value % 10 ;
	    if(value!=0) fResult = false ;
		var i;
		var c;
		for (i = 1; i < sId.length; i++){
			c = sId.charAt(i);
			if (LegalID.indexOf(c) == -1) fResult = false;
		}
	}
	if(fResult == false){
		alert("此身份證字號不正確!")
		obj.focus()
		return false; 
	}
	else return true;
}