function $(esc_tool){
return document.getElementById(esc_tool)
}
var char2entity = { "'" : ''', '"' : '"', '<' : '<', '>' : '>', '&' : '&'};
function escape_entities(str) {
var rv = '';
for (var i = 0;i < str.length; i++) {
var ch = str.charAt(i);
rv += char2entity[ch] || ch;
}
return rv;
}
function do_escape(e){
$('escaped').value = escape_entities(e.value)
}
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