function checkNull(id){
	alert("aaaa");
	var textObject = document.getElementById(id);
	alert("bbb : " + textObject);
	if(trimText(textObject.value) == ""){			
		return false;
	}		
	alert("ccc");
	return true;
}


function onlyNum(objtext1)
{		
	var ths = document.getElementById(objtext1);
	
	var NumEng = /^[-0-9]+$/;

	if(NumEng.test(ths.value) || ths.value == ""){
	  return true;
	} else{
	  return false;
	}		
}


function onlyEngNum(objtext1) {
	
	var ths = document.getElementById(objtext1);
		
	var NumEng = /^[A-Za-z0-9]+$/;
	
	if(NumEng.test(ths.value) || ths.value == ""){	
	  return true;
	} else{
	  return false;
	}		
}


function trimText (str) {
	str = str.replace(/^\s+/, '');	
	for (var i = str.length - 1; i > 0; i--) {		
		if (/\S/.test(str.charAt(i))) {			
			str = str.substring(0, i + 1);			
			break;		
		}	
	}	
	return str;
}

function jsCheckNull( toCheck ) 
{
     var chkstr = toCheck + "";
     var is_Space = true ;
    
     if ( ( chkstr == "") || ( chkstr == null ) ) 
	   return( true );

     for ( j = 0 ; is_Space && ( j < chkstr.length ) ; j++)
     {
	     if( chkstr.substring( j , j+1 ) != " " ) 
         {
	       is_Space = false ;
         }
     }
     return ( is_Space );
} 


String.prototype.replaceAll = function( searchStr, replaceStr )
{
    return this.split( searchStr ).join( replaceStr );
}