Can its possible to give validation to dialog list in javascrip(on blur) and on that dialoglist i give dbcolumn

hi,can its possible to give validation to dialog list in javascrip(on change) and on that dialoglist i give dbcolumn

i send code also

in dialoglist i have to check uniqness for (10 dialog list field in one column)i write uniqness code on change

when i give validation code on change and dbcolumn also then its not working properly its showing validation only dbcolumn not working

any solution plz help

this is code of uniqness check in column

function checkblankforcrc()

{

var f=document.forms[0];

var arr=new Array();

for(i=1;i<11;i++)

{

for(j=i+1;j<11;j++)

{

	a=eval('f.Crc_'+i)

	a1=eval('f.Crc_'+j)

	//arr[i]=a.options[a.selectedIndex].text

	//arr[j]=a1.options[a1.selectedIndex].text

	arr[i]=a.selectedIndex

	arr[j]=a1.selectedIndex

	

	if(arr[i] | arr[j] !="")

{ 

	if(arr[i]==arr[j])

	{

		alert("Entry existing")

		//a1.value="-Select-"

		a1.selectedIndex="-Select-"

	//a1.focus();

		//a.options[a.selectedIndex].text.focus()

		return false;

	}

}

}

}