function check_date(d){var i=document.search;if(i==null){return}var b=i.dt_ba;if(b==null||!b.checked){return}var g=i.ady.value;var c=i.bdy.value;var f=i.amo.value;var h=i.bmo.value;var a=i.ayr.value;var e=i.byr.value;if(isNaN(g)||isNaN(c)||isNaN(f)||isNaN(h)||isNaN(a)||isNaN(e)){alert(d);return false}if(g<1||c<1||f>12||h>12||f<1||h<1||a<1971||e<1971||a>2036||e>2036){alert(d);return false}mla=new Array(0,31,28,31,30,31,30,31,31,30,31,30,31);if((a%4)==0){mla[2]=29}if(g>mla[f]){alert(d);return false}if((e%4)==0){mla[2]=29}else{mla[2]=28}if(c>mla[h]){alert(d);return false}return true};