function ckaddmarket()
{
if (addmarket.mar_head.value.length >= "20"  ){alert( "請輸入 標題字數限制為 15個中文字 (包含 標點符號)" );addmarket.mar_head.focus();return false;}		
if (addmarket.mar_conname.value == "" ){alert( "請輸入 聯絡人" );addmarket.mar_conname.focus();return false;}	
if (addmarket.mar_pwd.value == "" ){alert( "請輸入 使用者密碼" );addmarket.mar_pwd.focus();return false;}	
if (addmarket.mar_contel.value == "" ){alert( "請輸入 聯絡電話" );addmarket.mar_contel.focus();return false;}	
if (addmarket.mar_conmail.value == "" ){alert( "請輸入 電子郵件信箱\n此為發送認證信件之方式\n請確實填寫\n您可以收到的電子郵件信箱" );addmarket.mar_conmail.focus();return false;}	
if (addmarket.mar_conmail.value !="" && addmarket.mar_conmail.value.indexOf ("@")== -1 ){alert("[ 電子郵件信箱 ] \n格式有誤!!");addmarket.mar_conmail.focus();return false;}

if (addmarket.mar_head.value == "" ){alert( "請輸入 標題" );addmarket.mar_head.focus();return false;}	
if (addmarket.mar_region.value == "" ){alert( "請輸入 區域" );addmarket.mar_region.focus();return false;}	
if (addmarket.mar_city.value == "" ){alert( "請輸入 鄉鎮" );addmarket.mar_city.focus();return false;}	
if (addmarket.mar_addrs.value == "" ){alert( "請輸入 地址" );addmarket.mar_addrs.focus();return false;}	
if (addmarket.mar_ground.value == "" ){alert( "請輸入 產權面積" );addmarket.mar_ground.focus();return false;}	
if (addmarket.mar_ground.value!=""){
		if (isNaN(addmarket.mar_ground.value.valueOf()) )  
		{	alert("使用產權面積請輸入數字!!!!");
 			addmarket.mar_ground.focus();return false;   }
 		} 
 		
 if (addmarket.mar_talcost.value == "" ){alert( "請輸入 總售價" );addmarket.mar_talcost.focus();return false;}	
 if (addmarket.mar_talcost.value!=""){
		if (isNaN(addmarket.mar_talcost.value.valueOf()) )  
		{	alert("使用總售價請輸入數字!!!!");
 			addmarket.mar_talcost.focus();return false;   }
 		} 

	}