/*
#hankaku
*/
function zentohan(obj){
	if(typeof(obj.value)!="string")return false;
	var han= '1234567890abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ@-.,:';
	var zen= '１２３４５６７８９０ａｂｃｄｅｆｇｈｉｊｋｌｍｎｏｐｑｒｓｔｕｖｗｘｙｚＡＢＣＤＥＦＧＨＩＪＫＬＭＮＯＰＱＲＳＴＵＶＷＸＹＺ＠−．，：';
	var word = obj.value;
	for(i=0;i<zen.length;i++){
		var regex = new RegExp(zen[i],"gm");
		word = word.replace(regex,han[i]);
	}
	obj.value = word;
}