function doTarget() {

if (!document.getElementsByTagName) return false;

var links = document.getElementsByTagName("a");

for (var i=0; i < links.length; i++) {

if (links[i].className.match("valid_blank")) {

links[i].onclick = function() {

window.open(this.href,"");

return false;

}

}

else if (links[i].className.match("valid_top")) {

links[i].onclick = function() {

// alert("動作テスト中です〜。");
// if (top != self) { top.location.href = this.href };

window.open(this.href, "_top");

return false;

}

}

}

}

window.onload = doTarget;