function checkNumber(num){
	for(var i=0;i<num.length;i++){
		if(isNaN(parseInt(num.charAt(i),10))) return 0;
	}

	if(parseInt(num,10)<0) return 0;
	return num.length;
}

function checkCalc(value){
	var retval = true;
	if ( value == "" ){ retval = retnull; }
	else { if( !checkNumber(value) ){ retval = false; }	}
	return retval;
}

function checkEmail(str)
{
  if (str.length==0){
      return false; 
  }else{
      if (str.match(/[!"#$%&'\(\)=\\|,:;^\[\]\{\}`*?<>]/)){
          return false;
      }else{
          if (str.indexOf("@",0)<=0){
              return false;
          }else{
              return true;
          }
      }
  }
}


function openTopics(id){
	window.open("topics_detail.php?id=" + id,"","width=640,height=500,scrollbars=yes,status=yes");
}

function openCompanyView(){
	window.open("companyview.html","","width=480,height=445,scrollbars=no,status=yes");
}

function openOffice(name){
	window.open(name,"","width=640,height=420,scrollbars=yes,status=yes");
}

function openOffice2(name){
	window.open(name,"","width=640,height=578,scrollbars=yes,status=yes");
}

function openMap(name){
	window.open(name,"","width=640,height=643,scrollbars=yes,status=yes");
}

function openTopics(id){
	window.open("topics_detail.php?id=" + id,"","width=640,height=500,scrollbars=yes,status=yes");
}