function fieldexists(fieldid){
	fieldid = fieldid.replace("field_", "row_");
	var productElement = document.getElementById(fieldid);
	if(productElement != null){return true;}else{return false;}
}

function fieldisvisible(fieldid){
	fieldid = fieldid.replace("field_", "row_");
	var productElement = document.getElementById(fieldid);
	if(productElement.style.display == ''){return true;}else{return false;}
}

function valueisinteger(val){
	if(isNaN(Math.abs(val))){if(val == ''){return '';}else{return val;}}else{return parseInt(val);}
}

function valuetocurrency(val,valtype){
	if(isNaN(Math.abs(val)) || valtype == 'nummer'){return val;}else{return formatCurrency(val);}
}

function getElmVal(ElmId){
	return document.getElementById(ElmId).value;
}

function setElmVal(ElmId, val){
	document.getElementById(ElmId).value = val;
}

function setElmDisplay(ElmId, display){
	document.getElementById(ElmId).style.display = display;
}

function setElminnerHTML(ElmId, HTML){
	document.getElementById(ElmId).innerHTML = HTML;
}

function rawurlencode( str ) {
    var histogram = {}, tmp_arr = [];
    var ret = str.toString();
 
    var replacer = function(search, replace, str) {
        var tmp_arr = [];
        tmp_arr = str.split(search);
        return tmp_arr.join(replace);
    };
 
    // The histogram is identical to the one in urldecode.
    histogram[" "]   = '%20';
    histogram["'"]   = '%27';
    histogram['(']   = '%28';
    histogram[')']   = '%29';
    histogram['*']   = '%2A'; 
    histogram['~']   = '%7E';
    histogram['!']   = '%21';
    histogram['\u20AC'] = '%80';
    histogram['\u0081'] = '%81';
    histogram['\u201A'] = '%82';
    histogram['\u0192'] = '%83';
    histogram['\u201E'] = '%84';
    histogram['\u2026'] = '%85';
    histogram['\u2020'] = '%86';
    histogram['\u2021'] = '%87';
    histogram['\u02C6'] = '%88';
    histogram['\u2030'] = '%89';
    histogram['\u0160'] = '%8A';
    histogram['\u2039'] = '%8B';
    histogram['\u0152'] = '%8C';
    histogram['\u008D'] = '%8D';
    histogram['\u017D'] = '%8E';
    histogram['\u008F'] = '%8F';
    histogram['\u0090'] = '%90';
    histogram['\u2018'] = '%91';
    histogram['\u2019'] = '%92';
    histogram['\u201C'] = '%93';
    histogram['\u201D'] = '%94';
    histogram['\u2022'] = '%95';
    histogram['\u2013'] = '%96';
    histogram['\u2014'] = '%97';
    histogram['\u02DC'] = '%98';
    histogram['\u2122'] = '%99';
    histogram['\u0161'] = '%9A';
    histogram['\u203A'] = '%9B';
    histogram['\u0153'] = '%9C';
    histogram['\u009D'] = '%9D';
    histogram['\u017E'] = '%9E';
    histogram['\u0178'] = '%9F';
 
 
    // Begin with encodeURIComponent, which most resembles PHP's encoding functions
    ret = encodeURIComponent(ret);
 
    // Restore spaces, converted by encodeURIComponent which is not rawurlencode compatible
    ret = replacer('%20', ' ', ret); // Custom replace. No regexing
 
    for (search in histogram) {
        replace = histogram[search];
        ret = replacer(search, replace, ret) // Custom replace. No regexing
    }
 
    // Uppercase for full PHP compatibility
    return ret.replace(/(\%([a-z0-9]{2}))/g, function(full, m1, m2) {
        return "%"+m2.toUpperCase();
    });
 
    return ret;
}