The current handling of the cp() function will cast any date beginning with a numeric char to a float. This means that sorting will not work for formats like "mm/dd/YYYY", "mm.dd.YYYY", etc. A quick fix would be to do a quick pattern match on the two variables to be sorted to check if they match that common format and avoid the parseFloat() handling altogether.
function cp(f,c){
var g,h; f=g=f.v.toLowerCase(), c=h=c.v.toLowerCase(), reg = /[0-9]{1,2}(\/|\.)[0-9]{1,2}(\/|\.)[0-9]{4}/i;
if (!(f.match(reg) && c.match(reg))) {
var i=parseFloat(f.replace(/(\$|\,)/g,'')), n=parseFloat(c.replace(/(\$|\,)/g,''));
if(!isNaN(i)&&!isNaN(n)){g=i,h=n}
}
i=Date.parse(f); n=Date.parse(c);
if(!isNaN(i)&&!isNaN(n)){g=i; h=n}
return g>h?1:(g<h?-1:0)
};
